Improvement in mechanism for operating the jacks in looms



dirigir t-aina A CHARLES H. KNOWLTON, OF CAMDEN, NEW JERSEY.

Letto/rs Patent No. 96,925, (lated November 16, 1869.

-IMPROVEMENT IN MECHANISM FOR OPERATING THE JACKS IN LOOMS.

The Schedule referred .to in these Letters Patent and making part of the same.

To all whom it may concern 4 Be it known that I, CHARLES H. KNOWLTON, of Camden, New Jersey, have invented a Device for .Operating the Jacks of Looms; and I do hereby declare the following to be a full, clear, and exact description of the same.

My invention consists of certain arms, hinged to and reciprocating with a jack-frame, and so controlled by levers, or their equivalents, that they shall be the means, through the jacks, of causing the heddles to open the warp-threads to a greater extent, as the said heddles recede from the shuttle, thereby preventing that undue strain to which the said threads are subjected when opened by the usual jack, all of vwhich is fully explained hereafter.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation, reference being had to the accompanying drawing, which forms a part of this specification, and in which- Figure 1 shows lthe side-frame of a loom, with myy improved mechanism for operating the jacks;

'Figure 2, a view of iig. 1, looking in the direction of the arrow; and

Figure 3, a diagram, illustrating the purport of my invention.

A represents the side-frame of a loom, and B, part of the crank-shaft, on the end of which, outside the frame, are two cranks c and a', iig. 2, the crank a, being connected by a link, b, to a rod, B, which'is ar'- ranged to slide in guides on the frame A of the loom,

and the crank a' being connected to a similar sliding rod, D', by a link, b.

lhe cranks are so arranged that on rotating the shaft B, a reciprocating motion, in contrary directions, will be imparted to the two sliding rods, one rod ascending while the other is descending.

The upper end of the rod D' is connected, by a cross-bar, E, to a suspension-rod, F, and the other sliding rod, by a similar cross-bar, to a similar suspension-rod, F.

To the lower end of the rod F is jointed a rod, G, and to the rod F' is jointed a similar` arm, G', both arms passing through and being g'nided by slots in a project-iomi, att-ached to the frame of the loom.

On the outer end of the arm G is a piu, ll, which passes through a slot in a projection, e, on the slidingrod D', a similar' pin on `the arm G passing through a slot in a similar' projection ou the sliding rod D.,

The pin Z of the arm G is embraced by the forked short arm of the lever H, hung to the sliding rod D', adjacent to the slot in the projection e, the long' arm of the lever passing through an eye in a stationary bar, J. v

In like manner, a pin on the endvof the arm G' is embraced by the forked short arm of alever, H', hung tothe rod D, the long arm in this lever passing through an eye in a stationary bar, J

In ordinary fancy-looms the well-known jacks, connected to the harness, are operated by two reciprocating frames, in some respects similar to those described. j l

lhe important difference between the old reciprocating frames and my improved device for operating the jacks is this, that the bars-(in the old frames) which come in contact with the projections of the jacks are permanent, where-as the bars, or, as I have termed them, the arms G and G', i'n my improved device have a peculiar movement imparted to them.

For instance, as the rod D reciprocates, it will carry with it the rod E and the arm G, but the position of theonter end of the arm is so controlled by the level H that the arm. must vibrate on the end of the rod F, and the saine remarks will apply to the arm G, and this vibration is so regulated by the arrangement of the moving parts that when the arm G is at its most elevated position, and the arm G at its lowest position, the two arms will be inclined, as shown in-iig. 1, and this is the condition when the warp-threads are open, for' the passage between them 0f the shuttle.

It will scarcely be necessary to describe the action of these arms on the jacks, but l' have shown in red lines, iig. 2, one of a row of jacks, to be operated by a pattern chain in the usual manner, so as to be brought under the control of' the arm G, or under that of the arm G', as the chain may be determined, with a result too well known to those skilled in the art to need description.

The advantage of my'invention will be best understood by reference tothe diagram, iig. 3, where It represents partof a woven fabric, m m, the open warpthreads, n n, a number ot'lheddles, connected to as many jacks, and p, the shuttle, in the act of passing between the open warp-threads.

When an ordinary reciprocating jack-frame is used, the Warp-threads will be. spread in the manner indicated by the red lines t t that is to say, all the warpthreads will be opened to the same extent; hence, the threads which are acted'on by the heddles nearest the shuttle are subjected to a severe strain, to avoid which is the special object of my invention..4

The inclination given to the arms G and G', in the manner described above, is such that when they have acted. on the jacks to open the warp-threads, the extent of the opening of the latter will vary.

A rigid reciprocating frame, sliding on a loom, and having ene or more arms G, vibrated substantially as and furthe purpose described.

in testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

CEAS. H. KNOVLTON.

Nitnessesz JOHN WHITE, HARRY SMITH 

